Connecting to Power
CAUTION
The wiring (not included) from the power source to the amplifier must run through an inline fuse or circuit
breaker (not included) as close to the power source as possible. You must connect the positive wire to the fuse
or circuit breaker. Connecting the amplifier to power without an inline fuse or circuit breaker may result in a fire
if there is a short in the cable.
If the amplifier is powered by a battery, use a breaker or fuse rated to protect a cable of the gauge used to
connect the amplifier to the battery. See the American Boat & Yacht Council (ABYC) standards for the required
fuse or breaker rating.
If the amplifier is powered by a source other than a battery, use a breaker or fuse rated no higher than the max
current of the power source.
You should use 4 AWG (21.1 mm
2
) copper-coated aluminum wire (not included) to connect the amplifier to
power and ground for most installations. For long power-cable runs, you should consider using larger-diameter
(smaller gauge number) wire to minimize power loss. If you are using pure copper wire instead of copper-
coated aluminum, you can use a smaller-diameter (larger gauge number) wire becase of the increased material
conductivity.
You must connect the REM terminal on the amplifier block to either the AMPLIFIER ON wire from the connected
stereo or to a constant 12 Vdc power source using a switch. Connecting to the AMPLIFIER ON wire is
recommended to avoid a popping sound when the stereo turns on or off.
1 Route the 2 AWG (33.6 mm
2
) copper-coated aluminum wire (not included) to the amplifier and to a ground
location on the boat.
2 Using a 5 mm (
7
/
32
in.) flat (slotted) screwdriver, connect the ground cable to the GND terminal on the power
connection block.
3 Connect the other end of the ground wire to the ground location.
4 Route the 2 AWG (33.6 mm
2
) copper-coated aluminum wire (not included) to the amplifier and to the power
source, and select an option:
• Install a properly rated in-line fuse on the power wire as close to the power source as possible.
• Identify or install a circuit breaker, as close to the power source as possible, for use with the amplifier
power wire.
5 Using a 5 mm (
7
/
32
in.) flat (slotted) screwdriver, connect the power (+) wire to the PWR terminal on the
power connection block.
6 Route a 20 AWG (0.52 mm
2
) wire from the amplifier to the AMPLIFIER ON wire on the stereo or to a 12 Vdc
power source through a switch.
Fusion Apollo Series Installation Instructions
9
